Earthquake Magnitude based on exponentional
Estimate a size for plotting earthqukes recorded as a logarithmic scale
getmagsize(mag, minsize = 1, slope = 1, minmag = 0, maxmag = 8, style = 1)
mag
: magnitudes from catalogminsize
: minimum sizeslope
: slope for linear scaleminmag
: min magnitudemaxmag
: max magnitudestyle
: Style of plotting: 0= all the same size; 1(default): exponential scale; 2=linear scaleThe idea is to have a scale reflect the size of the earthquake. The default style (1) has a few parameters left over from old program geotouch.
vector of sizes for plotting
Jonathan M. Leesjonathan.lees@unc.edu
mag = 0:9 x = runif(10, 1, 100) y = runif(10, 1, 100) g = getmagsize(mag) plot(c(0, 100), c(0, 100), asp=1, type='n') points(x, y, pch=1, cex=g)
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